IC2118 - The Witch Head Nebula

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Image Data: Object Information:
  • Exposure:  LRGB 40x300:18x300:18x220:18x130 seconds
    • L binned 1x1, RGB binned 2x2
  • Telescope:  Stellarvue SV80S @ f/4.77
  • Mount:  MI-250 GoTo
  • Camera:  SBIG ST-2000XM CCD, SBIG CFW-8
  • Location:  My backyard in Goleta, CA
  • Date/Time: 
    • L: November 14, 2004,  01:22-05:02 PST
    • RGB:
      November 15, 2004, 00:49-01:47 PST
      November 16,-17, 2004, 23:08-04:57 PST
  • Processing:  Taken  in CCDSoft v5 using CCDCommandere.  Reduced in CCDSoft.  Aligned with RegiStar.  Combined sub-exposures with Ray Gralak's Sigma Clip.  DDP to with custom software.  Curves, levels, saturation, unsharp mask, selective blur in Photoshop.

  • Notes:  "First light" image with new MI-250 mount.  Also a significant test for my new CCDCommander program - which completely automated the entire image acquisition, guide star location, auto guiding, mount flipping, mount movement, and focusing
  • Name:  IC 2118, NGC 1909, The Witch Head Nebula
  • Type:  Reflection nebula
  • Constellation:  Eridanus
  • Distance: 1000 light years
  • This nebula is a bit of dust in space that is reflecting the light from the nearby super giant Rigel in the constellation Orion.  The blue color is caused by Rigel's blue color and also because the dust reflects blue light better then other colors (similar to our atmosphere).
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